The Welsh Government report showed 3,882 people were found guilty of drink and drug-driving offences last year.

It added that while drug-driving tests had significantly increased, breath tests for drink driving fell by 11%.

Road safety charity Brake said the data showed both drink and drug driving were “still prevalent” on Welsh roads.

Ministry of Justice data included in the report showed the number of guilty verdicts in Wales for driving under the influence of a controlled drug above a specific limit rose by 95% in 2018, from 506 to 988 convictions.

However, the report said this rise did not necessarily reflect increases in drug driving due to significantly more drug testing being carried out by police.

The number of people found guilty of driving with alcohol in the blood above the prescribed limit rose by 3% from 2,285 to 2,353.

Despite a small rise in convictions in drink driving, the number of breath tests fell by 11% in the past year, with 36,975 conducted by Wales’ four police forces in 2018.

It represents a continued fall in the number of tests in the past decade, 70% fewer than the 123,019 tests carried out in 2009.

Although the number of tests has dropped significantly, the number of positive or refused results was similar between 2017 and 2018, with 4,474 recorded in 2018, but this was the lowest total since 1992.

Meanwhile, speeding, seatbelt and mobile phone offences all fell between 2017 and 2018.

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